#include <iostream>

//利用sizeof 输出类型大小， 输出 4  4
int main(int argc, char const *argv[])
{
    int x = 10;
    std::cout << sizeof(x) << '\n';
    std::cout << sizeof(int) << '\n';
    std::cout << "end--" << std::endl;
    return 0;
}
